BISCO® Silicones expand the parameters of 
possibility in product design engineering.

BISCO® Cellular Silicones are ideal for sealing, cushioning, vibration isolation, insulation and thermal management gaskets. Their resistance to environmental extremes, mechanical resilience and safety features make them perfectly suited for critical applications in transportation equipment, communications and electrical enclosures, electronic products and components, industrial machinery and appliances.

BISCO Cellular Silicones Offer:

  • Outstanding sealability to extreme environments and conditions
  • Unsurpassed compression-set resistance
  • Application temperature range of -67°F to 400°F(-55°C to 204°C)
  • Superb flame resistance (UL94 V-0 and HF-1 approved)
  • Variable grades of closure force from very soft to very firm
  • Extremely low toxic gas emission when exposed to fire
  • Excellent resistance to ozone and ultraviolet exposure
  • FDA approved materials

 
Application examples:
 
HT-800 BF-1000
  • HID lighting fixtures
  • Batterycushion in hand-held electronic products
  • Seals in equipment access panels
  • Electrical & electronic enclosure gaskets
  • Solder gun insulation pads for work stations
  • Low closure force gaskets and seals
  • Vibration and shock isolation in electronics & aircraft
  • Flame retardent, low toxicity insulation in aircraft & trains
  • Automotive airbag cushion seals
  • Industrial machinery insulation
 
 
BISCO Cellular Silicones Thickness Tolerances
 

Thickness

Product
Thickness Tolerance

Inches

 BF-1000 HT-800

1/16"

0.063"

±0.020"

±0.020"

3/32"

0.094"

 ±0.020" ±0.020"

1/8"

0.125"

 ±0.025" ±0.025"

3/16"

0.188"

 ±0.030" ±0.025"

1/4"

0.250"

 ±0.040" ±0.030"

3/8"

0.375"

 ±0.060" ±0.045"

1/2"

0.500"

 ±0.060" ±0.050"

3/4"

0.750"

 ±0.090" N/A

1"

1.000"

 ±0.090" N/A

 

Typical Physical Properties BISCO Cellular Silicone Materials
 
Property Test Method BF-1000 HT-800
Physical Properties
Compression Force Deflection, psi (kpa)  @ 25% Deflection

ASTM D-1056

2 (14)

8 (55)

Compression Set @ 70°C (158°F)

ASTM D-1056

< 1%

 < 1%
Compression Set @ 100°C (212°F)

ASTM D-1056

 < 5% < 5%
Density, lb/ft3 (kg/m3)

ASTM D-3574

 12 (192) 20 (320)
Tensile Strength, psi (kpa)

ASTM D-412

 35 (241) 45 (310)
Elongation, %

ASTM D-412

 100 80
Environmental Properties
Gasketing & Sealing
Rating

UL 157

N/A

JMLU-2 (Listed)
Water Absorption

ASTM D-471

 3.50% 1.40%
UV Resistance

SAE J-1960

 No Degradation No Degradation
Ozone Effect Rating

ASTM D-1171

 0 (No Cracks) 0 (No Cracks)
Stain Resistance

ASTM D-925(A)

 No Staining No Staining
Corrosion Resistance

AMS-3568

 Pass Pass
Flammability & Outgassing
***Flame Resistance

UL 94
UL 94

HF-1 (Listed)
V-0 (Listed)

HF-1 (Listed)
V-0 (Listed)
Flame Spread Index (Is)

ASTM E-162

 < 25 < 25
Limiting Oxygen Index (LOI)

ASTM D-2863

 34% 40%
Smoke Density (Dx) @ 4.0 minutes

ASTM E-662

 < 50 < 50
Smoke Density (Dx) @ 1.5 minutes

ASTM E-662

 < 20 < 20
Toxic Gas Emissions Rating

SMP-800C & BSS

 Pass Pass
Weight Loss After 168 Hours @ 135°C (275°F)

ASTM D-573

 1.20% 0.90%
Electrical & Thermal Properties
Dielectric Constant

ASTM D-149

1.34

1.42
Dielectric Strength (Volts/mil)

ASTM D-150

 89 91
Dry Arc Resistance (Seconds)

ASTM D-495

 90 92
Volume Resistivity
(Ohm - cm)

ASTM D-257

 1014 1014
Thermal Conductivity
(BTU in/hr/ft2/°F)
(Wm/°K)

ASTM C-518
0.39
0.06
0.63
0.09
Temperature Resistance
Hot Flex @ 230°C
(446°F)

ASTM D-573

Pass

Pass
Low Temperature Embrittlement

ASTM D-746 (B)

 -55°C (-67°F) -55°C (-67°F)
Recommended Use

SAE J-2236

 -55°C - 200°C
(-67°F- 392°F)		 -55°C - 200°C
(-67°F - 392°F)
Recommended Intermittent High Temperature Use

Rogers Internal

 250°C (482°F) 250°C (482°F)
Dimensions
Available Thickness Range

-

1/16" - 1"
(1.6mm-25.4mm)

 1/32" - 1/2"
(0.8mm-12.7mm)
Standard Widths
Standard Colours

-

 36" (914mm)*
White**		 36" (914mm)
Red, grey, Black
Specifications Available

FDA Approved

-

White & grey Colours only

 Grey Colour only

Other

-

BMS 1-68

 AMS-3195

*BF-1000 greater than 3/4" (19mm) thick is supplied in standard, 30" wide rolls.
**BF-1000 is standard in grey colour in 1/16" (1.6mm), 1/8" (3.2mm), 1/4" (6.4mm) and 1/2" (12.7mm) thicknesses.

***Underwriters limits fire ratings to specific colours, thickness and density. Consult available UL Yellow Cards for more detail.
 

All data is provided for guidance only due to the varied conditions of potential use which are beyond our control. All recommendations or suggestions are given without guarantee or responsibility on our part and users should make their own test to determine suitability.

 

KEMTRON LTD
19 - 21 Finch Drive
Springwood Industrial Estate
BRAINTREE, Essex, CM7 2SF
ENGLAND
Tel: +44 (0)1376 348115
Fax: +44 (0)1376 345885
www.kemtron.co.uk
email: info@kemtron.co.uk